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Coastal Atmosphere and Sea Time Series (CoASTS)In this document, the first three years of a time series of bio-optical marine and atmospheric measurements are presented and analyzed. These measurements were performed from an oceanographic tower in the northern Adriatic Sea within the framework of the Coastal Atmosphere and Sea Time Series (CoASTS) project, an ocean color calibration and validation activity. The data set collected includes spectral measurements of the in-water apparent (diffuse attenuation coefficient, reflectance, Q-factor, etc.) and inherent (absorption and scattering coefficients) optical properties, as well as the concentrations of the main optical components (pigment and suspended matter concentrations). Clear seasonal patterns are exhibited by the marine quantities on which an appreciable short-term variability (on the order of a half day to one day) is superimposed. This short-term variability is well correlated with the changes in salinity at the surface resulting from the southward transport of freshwater coming from the northern rivers. Concentrations of chlorophyll alpha and total suspended matter span more than two orders of magnitude. The bio-optical characteristics of the measurement site pertain to both Case-I (about 64%) and Case-II (about 36%) waters, based on a relationship between the beam attenuation coefficient at 660nm and the chlorophyll alpha concentration. Empirical algorithms relating in-water remote sensing reflectance ratios and optical components or properties of interest (chlorophyll alpha, total suspended matter, and the diffuse attenuation coefficient) are presented.
Document ID
20020068971
Acquisition Source
Goddard Space Flight Center
Document Type
Technical Memorandum (TM)
Authors
Hooker, Stanford B. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Firestone, Elaine R. (Science Applications International Corp. Beltsville, MD United States)
Berthon, Jean-Francoise (Joint Research Centre of the European Communities Ispra, Italy)
Zibordi, Giuseppe (Joint Research Centre of the European Communities Ispra, Italy)
Doyle, John P. (Joint Research Centre of the European Communities Ispra, Italy)
Grossi, Stefania (Joint Research Centre of the European Communities Ispra, Italy)
vanderLinde, Dirk (Joint Research Centre of the European Communities Ispra, Italy)
Targa, Cristina (Joint Research Centre of the European Communities Ispra, Italy)
McClain, Charles R.
Date Acquired
September 7, 2013
Publication Date
June 1, 2002
Subject Category
Oceanography
Report/Patent Number
NASA/TM-2002-206892/VOL20
NAS 1.15:206892/VOL20
Rept-2002-02646-0-VOL20
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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